package com.ttao.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    /**
     * 正常访问
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池：" +
                Thread.currentThread().getName() +
                " paymentInfo_OK, id:" +
                id + "\t" +
                "(*╹▽╹*)";
    }

    @HystrixCommand(fallbackMethod = "paymentInfo_TimeoutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")
    })
    public String paymentInfo_Timeout(Integer id) {
        int timeNumber = 5;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" +
                Thread.currentThread().getName() +
                " paymentInfo_Timeout, id:" +
                id + "\t" +
                "o(╥﹏╥)o 耗时" +
                timeNumber + "秒";
    }

    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), //是否开启熔断器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"), //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), //时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"), //失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(Integer id) {
        if (id < 0) {
            throw new RuntimeException("******id 不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" +
                "调用成功，流水号：" + serialNumber;
    }

    public String paymentInfo_TimeoutHandler(Integer id) {
        return "线程池：" +
                Thread.currentThread().getName() +
                " paymentInfo_TimeoutHandler, id:" +
                id + "\t" +
                "系统繁忙，请稍后再试****o(╥﹏╥)o";
    }

    //兜底降级的方法
    public String paymentCircuitBreaker_fallback(Integer id) {
        return "id 不能为负数，请稍后再试。。。。id:" + id;
    }
}
